Figure 4.22. Tunneling Multicast using GRE
The IPv4 address book object called mc_group on both sides of the tunnel is the same multicast
IPv4 range. In this example, 239.100.100.0/24.
A. Server Side Configuration Setup
For the server side configuration, assume the client network is the IPv4 address book object
client_net, the local internal tunnel endpoint is If2_ip (the server is on the If2 interface). A GRE
tunnel called gre_to_clients is configured and the remote network is the address book object
called client_net.
GRE Tunnel
Name IP Address Remote Endpoint Remote Network
gre_to_clients If2_ip client_interface_ip client_net
Routes
Provided that the above GRE object has the option to automatically add routes enabled, the
following route will be added by NetDefendOS to the main routing table.
Network Interface
client_net gre_to_clients
Services
Name Type Destination Ports
mc_stream udp 1234
Chapter 4: Routing
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